Municipal drainage ditch with vegetation maintenance layer and maintenance method thereof
By designing a structure with vegetation maintenance layer in municipal drainage ditches, using root extension structure and cavity design, the problem of plant root spread affecting drainage efficiency is solved, and efficient drainage and plant root protection is achieved.
Patent Information
- Application Number
- CN202510040486.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-04-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, planting plants directly in drainage ditches will lead to the spread of the plant roots, affect the drainage efficiency, and easily cause blockage.
A municipal drainage ditch with vegetation maintenance layer is designed, using a root extension structure, a cavity design, a sliding dislocation control valve plate and a filter plate to ensure that the plant roots grow in a suitable environment without spreading everywhere and ensuring drainage efficiency.
Through this design, it effectively prevents flooding during flooding, protects the plant roots, and ensures drainage efficiency, reduces blockage in the maintenance chamber and drainage system, making it easier to clean and maintain regularly.
Smart Images
Figure CN119744679A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of greening maintenance, and in particular to a municipal drainage ditch with a vegetation maintenance layer and a maintenance method thereof. Background Art
[0002] Drainage ditches are essential channels in municipal construction. While they effectively discharge urban sewage, they can also provide relief during the rainy season. With the construction of ecological cities, the role of drainage ditches is not only limited to drainage, but can also play a role in greening and water replenishment.
[0003] However, although directly placing plants on the drainage ditch can allow the plants to absorb enough water, the spreading of plant roots is not conducive to the drainage function of the drainage ditch and is prone to cause blockage. In response to the above-mentioned related technologies, the applicant has proposed a drainage ditch with a plant maintenance layer that prevents the spread of plant roots and affects the drainage efficiency. Summary of the invention
[0004] In order to prevent the spread of plant roots and affect the drainage efficiency of the drainage ditch with a plant maintenance layer, the present application provides a municipal drainage ditch with a vegetation maintenance layer and a maintenance method thereof.
[0005] The present application provides a municipal drainage ditch with a vegetation maintenance layer and a maintenance method thereof, which adopts the following technical solutions:
[0006] A municipal drainage ditch with a vegetation maintenance layer comprises a drainage ditch, a green flower bed is arranged on one side of the drainage ditch, the side wall of the green flower bed extends and is connected to a root extension structure penetrating the bottom of the drainage ditch, the fibrous roots of the plants are accommodated in the root extension structure and extend downward; the left and right chambers in the drainage ditch are arranged as a drainage chamber and a maintenance chamber, the root extension structure is accommodated on one side of the smaller maintenance chamber of the drainage ditch, the drainage chamber opens upward and is provided with a drainage structure, the drainage structure comprises a filter plate and a corresponding filter plate arranged at intervals and inclined downward toward the maintenance chamber A control valve plate is provided on the plate to form a gap between the plates and can be slidably displaced, and the bottom end of the filter plate is connected to the top of the maintenance chamber; the bottom end of the maintenance chamber is connected to an anti-overflow structure corresponding to the root extension structure for lifting, the anti-overflow structure can float on the water surface and support the bottom end of the root extension structure to rise, and a connecting port is opened at the bottom of the drainage chamber and the side wall of the maintenance chamber corresponding to the anti-overflow structure, the anti-overflow structure abuts against the connecting port, and a control structure for driving the control valve plate and the filter plate to be displaced is provided on the control valve plate; when the anti-overflow structure is displaced from the connecting port, the gap between the filter plates is connected to the drainage chamber.
[0007] By adopting the above technical solution, the combination of green flower beds and drainage ditches not only solves the urban drainage problem, but also adds green landscape. The design of the root extension structure enables the fibrous roots of plants to grow downward in a suitable environment and not spread everywhere. The separate chamber design of the drainage chamber and the maintenance chamber, combined with the slidable and displaced control valve plate and filter plate, can intelligently adjust the water flow according to the water level, effectively prevent flooding during floods, protect the plant roots while ensuring drainage efficiency, and demonstrate a high degree of system flexibility and adaptability. The filter plate can intercept impurities in the water flow, reduce blockage of the maintenance chamber and the drainage system, and cooperate with the control structure to facilitate regular cleaning and maintenance.
[0008] Preferably, the root extension structure includes a diameter limiting opening, an outer folded tube, an inner folded tube and a permeable gauze. The diameter limiting opening is opened on the side wall of the greening flower bed close to the drainage ditch, and the diameter limiting opening gradually becomes thinner from the greening flower bed side toward the drainage ditch side; the outer folded tube is sleeved on the thinner end of the diameter limiting opening and extends toward the bottom of the maintenance cavity; the inner folded tube is accommodated in the outer folded tube with a gap, and a plurality of air holes connected inside and outside are opened on the side wall of the inner folded tube, and the outer folded tube extends to the bottom of the maintenance cavity, and the inner folded tube is at the maximum length; the permeable gauze is sleeved on the bottom opening of the inner folded tube.
[0009] By adopting the above technical solution, the gradual design of the limited diameter opening helps to control soil loss and limit the unlimited growth of plant roots. The air hole design on the inner folded tube effectively ensures air circulation, promotes root respiration, and avoids root diseases caused by soil water saturation. The permeable gauze is located at the bottom of the inner folded tube to maintain good water permeability and ensure an adequate supply of water.
[0010] Preferably, the anti-overflow structure includes a floating box, a lifting bracket and a water storage bin, the lifting bracket extends longitudinally in the maintenance cavity; the floating box is lifted and connected to the lifting bracket, and the floating box is arranged below the outer folding tube; the water storage bin is opened at the top of the floating box, and the inner folding tube is passed through and fixed to the water storage bin.
[0011] Preferably, the communication port extends transversely, and the side wall of the floating box abuts against the communication port.
[0012] Preferably, the drainage structure also includes an interception plate, which is vertically spaced and arranged with the filter plate, and the interception plate is fixed to the filter plate on the side close to the maintenance chamber and extends upward; the control valve plate is bent upward and inserted between the interception plates, and the control valve plate is laterally slidably connected to the drainage chamber; when the control valve plate is accommodated in the gap between the filter plates, the upward extending end of the control valve plate is horizontally misaligned with the interception plate, and when the control valve plate slides between the interception plates, the control valve plate and the filter plate are misaligned.
[0013] By adopting the above technical solution, the interception plate not only plays the role of physical partition, but also can further intercept larger debris and work together with the filter plate to effectively purify the water quality flowing into the maintenance chamber and reduce the deposition of pollutants. The interval setting of the interception plate and the filter plate, combined with the movable adjustment of the control valve plate, realizes the refined control of the water flow direction and flow rate.
[0014] Preferably, the control structure includes a pressure switch and a control solenoid valve, the pressure switch is fixed to the inner wall of the maintenance chamber and is arranged corresponding to the top of the float box; the control solenoid valve is fixed to the drainage ditch, and the movable end of the control solenoid valve slides laterally and is fixed to a number of control valve plates, and the pressure switch is electrically connected to the control solenoid valve; when the float box is misaligned with the connecting port, the float box abuts against the pressure switch.
[0015] Preferably, a curb is provided on one side of the drainage cavity close to the maintenance cavity, and the curb is staggered with the filter plate and the interception plate.
[0016] Preferably, a manhole cover is arranged above the drainage ditch, and two ends of the manhole cover are arranged corresponding to the two ends opposite to the intercepting plate and the filter plate.
[0017] A maintenance method for a municipal drainage ditch with a vegetation maintenance layer, comprising:
[0018] S1: Water flows through the manhole cover into the drainage ditch. At this time, the control valve plate is inserted into the gap between the filter plates and is offset from the interception plate. Water flows through the upper surface of the filter plates into the maintenance cavity and drips into the water storage tank of the floating box for water storage;
[0019] S2: The plant roots are affected by water vapor and grow toward the limited diameter opening. Due to the diameter restriction of the limited diameter opening, only the thin fibrous roots of the plant grow inward to absorb water. The fibrous roots are contained in the inner folded tube and then extend downward to be contained in the water storage tank to absorb water.
[0020] S3: When the water inflow at the manhole cover increases, the water overflows the water storage tank and forms a liquid surface in the drainage chamber. The water is discharged outward through the maintenance chamber. While the water flow flushes the maintenance chamber for self-cleaning, the liquid surface drives the float box to float up to avoid being submerged too much by water; when the water inflow at the manhole cover continues to increase, the maintenance chamber cannot bear the drainage work. At this time, the float box continues to float up, causing the side wall of the float box and the connecting port to be misaligned, and the water enters the drainage chamber to assist in drainage; when the water inflow at the manhole cover increases again, the auxiliary drainage of the connecting port can no longer bear the drainage work. The float box continues to float up and abuts against the pressure switch above, controlling the valve plate to move horizontally so that the water flows directly into the drainage chamber at the manhole cover for rapid drainage, thereby ensuring drainage efficiency.
[0021] In summary, the present application includes at least one of the following beneficial technical effects:
[0022] 1. The combination of green flower beds and drainage ditches not only solves the urban drainage problem, but also adds green landscape. The design of the root extension structure enables the fibrous roots of plants to grow downward in a suitable environment and not spread everywhere. The separate chamber design of the drainage chamber and the maintenance chamber, combined with the slidable and dislocated control valve plate and filter plate, can intelligently adjust the water flow according to the water level, effectively prevent flooding during floods, protect the plant roots and ensure drainage efficiency, showing a high degree of system flexibility and adaptability. The filter plate can intercept impurities in the water flow, reduce the blockage of the maintenance chamber and the drainage system, and cooperate with the control structure to facilitate regular cleaning and maintenance;
[0023] 2. The gradual change design of the limited diameter helps to control soil loss and limit the unlimited growth of plant roots. The air hole design on the inner folded tube effectively ensures air circulation, promotes root respiration, and avoids root diseases caused by soil water saturation. The water-permeable gauze is located at the bottom of the inner folded tube to maintain good water permeability and ensure sufficient water supply;
[0024] 3. The interception plate not only serves as a physical partition, but also can further intercept larger debris and work together with the filter plate to effectively purify the water flowing into the maintenance chamber and reduce the deposition of pollutants. The interval setting between the interception plate and the filter plate, combined with the movable adjustment of the control valve plate, realizes the refined control of the water flow direction and flow rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;
[0026] Figure 2 is a cross-sectional view of an embodiment of the present application;
[0027] Figure 3 is a partial cross-sectional view showing a water-permeable gauze according to an embodiment of the present application;
[0028] Figure 4 It is a side view showing the drainage structure of an embodiment of the present application.
[0029] Explanation of the reference numerals in the accompanying drawings: 1. Drainage ditch; 2. Greening flower bed; 3. Root extension structure; 31. Diameter limiting opening; 32. Outer folding tube; 33. Inner folding tube; 34. Permeable gauze; 4. Drainage chamber; 5. Maintenance chamber; 6. Drainage structure; 61. Filter plate; 62. Control valve plate; 63. Interceptor plate; 7. Anti-overflow structure; 71. Floating box; 72. Lifting bracket; 73. Water storage tank; 8. Connecting port; 9. Control structure; 91. Pressure switch; 92. Control solenoid valve; 10. Curbstone; 11. Manhole cover. DETAILED DESCRIPTION
[0030] The present application is further described in detail below in conjunction with the accompanying drawings.
[0031] The present application embodiment discloses a municipal drainage ditch with a vegetation maintenance layer and a maintenance method thereof, referring to Figure 1 , 2 , including a drainage ditch 1, a green flower bed 2 is arranged on one side of the drainage ditch 1, plants are planted in the green flower bed 2, the side wall of the green flower bed 2 extends and is connected to a root extension structure 3 penetrating the bottom end of the drainage ditch 1, and the fibrous roots of the plants are accommodated in the root extension structure 3 and extend downward; the left and right chambers in the drainage ditch 1 are arranged as a drainage chamber 4 and a maintenance chamber 5, and the root extension structure 3 is accommodated on one side of the smaller maintenance chamber 5 of the drainage ditch 1, thereby facilitating the maintenance of the water level on one side of the maintenance chamber 5.
[0032] Reference Figure 2 , 3 The root extension structure 3 includes a diameter-limiting opening 31, an outer folded tube 32, an inner folded tube 33 and a water-permeable gauze 34. The diameter-limiting opening 31 is opened on the side wall of the greening flower bed 2 close to the drainage ditch 1, and the diameter-limiting opening 31 gradually tapers from the side of the greening flower bed 2 toward the side of the drainage ditch 1, thereby limiting the penetration of the main root and lateral root of the plant and only allowing the fibrous root of the plant to enter and absorb water; the outer folded tube 32 is sleeved on the thinner end of the diameter-limiting opening 31 and extends toward the bottom of the maintenance cavity 5, so that the root system of the plant grows in a directional manner; the inner folded tube 32 is sleeved on the thinner end of the diameter-limiting opening 31 and extends toward the bottom of the maintenance cavity 5, so that the root system of the plant grows in a directional manner; The inner folded tube 33 is accommodated in the outer folded tube 32 with a gap, and the side wall of the inner folded tube 33 is provided with a number of air holes connected inside and outside to maintain sufficient oxygen, and the outer folded tube 32 extends to the bottom end of the maintenance chamber 5, and the inner folded tube 33 is at the maximum length to prevent the unlimited expansion of the fibrous roots and leave a certain shrinkage space; the permeable gauze 34 is sleeved on the bottom opening of the inner folded tube 33, and the fibrous roots of the plants can absorb water through the permeable gauze 34, but will not grow into the drainage ditch 1 to block the ditch.
[0033] Reference Figure 2 , 4 When the precipitation is small, the drainage chamber 4 opens upward and supplies water through the drainage structure 6. The drainage structure 6 includes a filter plate 61, a control valve plate 62 and an interception plate 63. The filter plate 61 is arranged at intervals along the drainage chamber 4 and tilted downward toward the maintenance chamber 5. The bottom end of the filter plate 61 is connected to the top of the maintenance chamber 5; the interception plate 63 is vertically spaced and arranged with the filter plate 61. The interception plate 63 is fixed to the side of the filter plate 61 close to the maintenance chamber 5 and extends upward, thereby forming a horizontal and an oblique fence. The fence can filter garbage at an inclined and vertical angle, thereby preventing debris from entering the drainage ditch 1; the control valve plate 62 is bent and extended and arranged corresponding to the gap between the adjacent filter plates 61 and the adjacent interception plates 63. The control valve plate 62 is laterally slidably connected to the drainage chamber 4.
[0034] Reference Figure 2 , 4, and the control valve plate 62 is biased inwardly to be slightly smaller than the shape formed by the intercepting plate 63 and the filter plate 61, thereby forming a single-sided abutment. When the control valve plate 62 is accommodated in the gap between the filter plates 61, the control valve plate 62 closes one side of the drainage chamber 4, and the upwardly extending end of the control valve plate 62 is horizontally offset from the intercepting plate 63, and water enters the maintenance chamber 5 through the inclined surface of the filter plate 61. When the control valve plate 62 slides between the intercepting plates 63, the control valve plate 62 closes one side of the maintenance chamber 5, the control valve plate 62 is offset from the filter plate 61, and water directly enters the drainage chamber 4 through the gap of the filter plate 61.
[0035] Reference Figure 2 , 4 , the control valve plate 62 is driven to slide by the control structure 9, the control structure 9 includes a pressure switch 91 and a control solenoid valve 92, the pressure switch 91 is fixed to the inner wall of the curing chamber 5, the pressure switch 91 is activated by the anti-overflow structure 7, the anti-overflow structure 7 includes a floating box 71, a lifting bracket 72 and a water storage bin 73, the lifting bracket 72 extends longitudinally in the curing chamber 5; the floating box 71 is lifted and connected to the lifting bracket 72, and the floating box 71 is arranged below the outer folding tube 32, the outer folding tube 32 and the inner folding tube 33 can be folded in coordination with the rise of the floating box 71, and the inner folding tube 33 can expand laterally, so that the internal root fibers can be extended laterally for deformation; the water storage bin 73 is opened at the top of the floating box 71 for water storage, and the inner folding tube 33 is passed through and fixed to the water storage bin 73, so that the inner folding tube 33 can obtain a stable water source even in rainless weather.
[0036] Reference Figure 2 , 4 , the pressure switch 91 is arranged above the corresponding floating box 71; the control solenoid valve 92 is fixed to the drainage ditch 1, and the movable end of the control solenoid valve 92 slides horizontally and is fixed to a plurality of control valve plates 62, and the pressure switch 91 is electrically connected to the control solenoid valve 92; a laterally extending communication port 8 is opened at the bottom of the side wall of the drainage chamber 4 and the maintenance chamber 5 corresponding to the floating box 71, and the side wall of the floating box 71 abuts against the communication port 8; when the rainfall is less, the water level in the maintenance chamber 5 is not high enough to allow the floating box 71 to float, at this time, the control valve plate 62 and the barrier The cut-off plate 63 is misaligned, and the water flows through the maintenance chamber 5 to complete the drainage work; and when the water level in the maintenance chamber 5 continues to rise, the drainage volume needs to be increased, and the raised float box 71 is misaligned with the connecting port 8, and part of the water flows into the drainage chamber 4 for rapid drainage; at the same time, when the float box 71 is misaligned with the connecting port 8, the float box 71 abuts against the pressure switch 91, and the control solenoid valve 92 drives the control valve plate 62 to move horizontally and be misaligned with the filter plate 61, and the water entering the drainage ditch 1 directly enters the drainage chamber 4 for drainage, thereby accelerating the drainage speed.
[0037] Reference Figure 2 , 4A curbstone 10 is provided on one side of the drainage chamber 4 close to the maintenance chamber 5. The curbstone 10 is staggered with the filter plate 61 and the interception plate 63. A manhole cover 11 is arranged above the drainage ditch 1. The two ends of the manhole cover 11 are arranged corresponding to the two ends opposite to the interception plate 63 and the filter plate 61. The appearance of the drainage ditch 1 designed in this way is no different from that of an ordinary drainage hook, which is convenient for modification.
[0038] The working process of the present application is as follows: S1: water flows through the manhole cover 11 into the drainage ditch 1, at this time the control valve plate 62 is inserted into the gap of the filter plate 61 and is offset from the interception plate 63, the water flows through the upper surface of the filter plate 61 into the maintenance cavity 5 and drips into the water storage tank 73 of the floating box 71 for water storage.
[0039] S2: The plant roots are affected by the water vapor and grow toward the diameter limiting opening 31. Due to the diameter restriction of the diameter limiting opening 31, only the thin fibrous roots of the plant grow inward to absorb water. The fibrous roots are accommodated in the inner folded tube 33 and then extend downward to be accommodated in the water storage tank 73 to absorb water.
[0040] S3: When the water inflow at the manhole cover 11 increases, the water overflows the water storage tank 73 and forms a liquid surface in the drainage chamber 4. The water is discharged outward through the maintenance chamber 5. While the water flow flushes the maintenance chamber 5 for self-cleaning, the liquid surface drives the floating box 71 to float up to avoid being submerged too much by water; when the water inflow at the manhole cover 11 continues to increase, the maintenance chamber 5 cannot bear the drainage work. At this time, the floating box 71 continues to float up, so that the side wall of the floating box 71 is misaligned with the connecting port 8, and the water enters the drainage chamber 4 to assist in drainage; when the water inflow at the manhole cover 11 increases again, the auxiliary drainage of the connecting port 8 can no longer bear the drainage work. The floating box 71 continues to float up and abuts against the upper pressure switch 91, and the control valve plate 62 moves horizontally to allow the water flow to directly enter the drainage chamber 4 at the manhole cover 11 for rapid drainage, thereby ensuring drainage efficiency.
[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A municipal drainage ditch with a vegetation maintenance layer, comprising a drainage ditch (1), characterized in that: A greening flower bed (2) is provided on one side of the drainage ditch (1); the side wall of the greening flower bed (2) extends and is connected to a root extension structure (3) penetrating the bottom end of the drainage ditch (1); the fibrous roots of the plants are accommodated in the root extension structure (3) and extend downward; the left and right chambers in the drainage ditch (1) are arranged as a drainage chamber (4) and a maintenance chamber (5); the root extension structure (3) is accommodated on one side of the smaller maintenance chamber (5) of the drainage ditch (1); the drainage chamber (4) is upwardly open and is provided with a drainage structure (6); the drainage structure (6) comprises a filter plate (61) inclined downward and spaced apart from the maintenance chamber (5) and a control valve plate (62) corresponding to the gap between the filter plates (61) and slidably displaced. ), the bottom end of the filter plate (61) is connected to the top end of the maintenance chamber (5); the bottom end of the maintenance chamber (5) is connected to an anti-overflow structure (7) arranged corresponding to the root extension structure (3) in a lifting manner, the anti-overflow structure (7) can float on the water surface and support the bottom end of the root extension structure (3) to rise, a communication port (8) is provided at the bottom of the side wall of the drainage chamber (4) and the maintenance chamber (5) corresponding to the anti-overflow structure (7), the anti-overflow structure (7) is in contact with the communication port (8), and a control structure (9) for driving the control valve plate (62) and the filter plate (61) to be misaligned is provided on the control valve plate (62); when the anti-overflow structure (7) and the communication port (8) are misaligned, the gap between the filter plates (61) is connected to the drainage chamber (4).
2. A municipal drainage ditch with a vegetation maintenance layer according to claim 1, characterized in that: The root extension structure (3) comprises a diameter limiting opening (31), an outer folded tube (32), an inner folded tube (33) and a water-permeable gauze (34); the diameter limiting opening (31) is provided on the side wall of the greening flower bed (2) close to the drainage ditch (1), and the diameter limiting opening (31) gradually tapers from the side of the greening flower bed (2) toward the side of the drainage ditch (1); the outer folded tube (32) is sleeved on the thinner end of the diameter limiting opening (31) and extends toward the bottom of the maintenance chamber (5); the inner folded tube (33) is accommodated in the outer folded tube (32) with a gap, a plurality of air holes communicating with each other are provided on the side wall of the inner folded tube (33), and the outer folded tube (32) extends to the bottom of the maintenance chamber (5), and the inner folded tube (33) is at its maximum length; the water-permeable gauze (34) is sleeved on the bottom opening of the inner folded tube (33).
3. A municipal drainage ditch with a vegetation maintenance layer according to claim 2, characterized in that: The anti-overflow structure (7) comprises a floating box (71), a lifting bracket (72) and a water storage bin (73); the lifting bracket (72) extends longitudinally in the curing chamber (5); the floating box (71) is connected to the lifting bracket (72) in a lifting manner, and the floating box (71) is arranged below the outer folding tube (32); the water storage bin (73) is opened at the top of the floating box (71), and the inner folding tube (33) is passed through and fixed to the water storage bin (73).
4. A municipal drainage ditch with a vegetation maintenance layer according to claim 3, characterized in that: The communication opening (8) extends transversely, and the side wall of the floating box (71) abuts against the communication opening (8).
5. The municipal drainage ditch with a vegetation maintenance layer according to claim 1, characterized in that: The drainage structure (6) further comprises an intercepting plate (63), the intercepting plate (63) being vertically spaced and arranged with the filter plate (61), the intercepting plate (63) being fixed to a side of the filter plate (61) close to the maintenance chamber (5) and extending upward; the control valve plate (62) being bent upward and inserted between the intercepting plates (63), the control valve plate (62) being laterally slidably connected to the drainage chamber (4); when the control valve plate (62) is accommodated in the gap between the filter plates (61), the upwardly extending end of the control valve plate (62) is horizontally misaligned with the intercepting plate (63), and when the control valve plate (62) slides between the intercepting plates (63), the control valve plate (62) and the filter plate (61) are misaligned.
6. The municipal drainage ditch with a vegetation maintenance layer according to claim 3, characterized in that: The control structure (9) comprises a pressure switch (91) and a control solenoid valve (92); the pressure switch (91) is fixed to the inner wall of the curing chamber (5) and is arranged above the corresponding floating box (71); the control solenoid valve (92) is fixed to the drainage ditch (1), and the movable end of the control solenoid valve (92) slides horizontally and is fixed to a plurality of control valve plates (62); the pressure switch (91) is electrically connected to the control solenoid valve (92); when the floating box (71) and the connecting port (8) are misaligned, the floating box (71) abuts against the pressure switch (91).
7. The municipal drainage ditch with a vegetation maintenance layer according to claim 5, characterized in that: A curbstone (10) is provided on one side of the drainage cavity (4) close to the maintenance cavity (5), and the curbstone (10) is arranged in a staggered manner with the filter plate (61) and the interception plate (63).
8. The municipal drainage ditch with a vegetation maintenance layer according to claim 1, characterized in that: A manhole cover (11) is arranged above the drainage ditch (1), and two ends of the manhole cover (11) are arranged corresponding to the two ends opposite to the interception plate (63) and the filter plate (61).
9. A method for maintaining a municipal drainage ditch with a vegetation maintenance layer according to any one of claims 1 to 8, comprising: S1: Water flows through the manhole cover (11) and enters the drainage ditch (1). At this time, the control valve plate (62) is inserted into the gap of the filter plate (61) and is offset from the interception plate (63). The water flows through the upper surface of the filter plate (61) into the maintenance cavity (5) and drips into the water storage bin (73) of the floating box (71) for water storage; S2: The plant root system is affected by the water vapor and grows toward the diameter-limiting opening (31). Due to the diameter restriction of the diameter-limiting opening (31), only the thin and weak fibrous roots of the plant grow inward to absorb water. The fibrous roots are accommodated in the inner folded tube (33) and then extend downward to be accommodated in the water storage bin (73) to absorb water; S3: When the amount of water entering the manhole cover (11) increases, the water overflows the water storage tank (73) and forms a liquid surface in the drainage chamber (4). The water is discharged outward through the maintenance chamber (5). While the water flow flushes the maintenance chamber (5) for self-cleaning, the liquid surface drives the floating box (71) to float up to avoid being submerged too much by water. When the amount of water entering the manhole cover (11) continues to increase, the maintenance chamber (5) cannot bear the drainage work. At this time, the floating box (71) continues to float up, so that the side wall of the floating box (71) and the connecting port (8) are misaligned, and the water enters the drainage chamber (4) to assist drainage. When the amount of water entering the manhole cover (11) increases again, the auxiliary drainage of the connecting port (8) cannot bear the drainage work. The floating box (71) continues to float up and abuts against the upper pressure switch (91), and the control valve plate (62) moves horizontally so that the water flow directly enters the drainage chamber (4) at the manhole cover (11) for rapid drainage, thereby ensuring drainage efficiency.